21.It is known to all that gunpowder is ___ Chinese invention,as is the compass,___ instrument that you use for finding directions.A.a; the.B/; an C.a;an D./;the

it known to all还是it is known to all 是as is known to...还是as iT known to... ___the emei mountain is famous for its beauty/A as is known to all B it is known to all C it is known to us al that D as we all know thatwhy use C,tell me why and the other why not use them/> it is known to all that 和as is known to all that 区别 As is known to us.和It is known to us.后面接什么啊?为啥 It Is known to us 和as is known to us 有什么区别 如何区别As is known to all与It is known to all? It is well-known It is known to all that sea water__(contain)salt. it is well known to us that是什么意思 as it is known to all与as is known to all与it is known to all请问,有没有as it is known to all THANK YOU! it is known to us all,as is known to us all和what is known to us all有什么区别 it is well known that _______,the compass was first made in China.A.It is known to all B.We all know C.As is known to allD.Itis known that 有关as is known to us all,it is known to us all 的辨析1.As is known to us all,the earth is round.2.It is known to us all that the earthe is round.3.what is known to us all is that the whale is not fish but mammal.请问这3个分别是什么从 as is known,it is known不同用法? As is known 还是It is known英语 It’s known to all that.把it换成what,that后面为什么要加上is.